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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

0.4
0.3
0.21
0.23

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Steam Boilers, Engines, Nozzles and Turbines
The overall efficiency of thermal power plant is

Boiler efficiency, turbine efficiency, generator efficiency
Regenerative cycle efficiency
All the three above plus gas cycle efficiency
Carnot cycle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The actual power generated in the engine cylinder is called

Frictional power
Indicated power
None of these
Brake power

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Steam Boilers, Engines, Nozzles and Turbines
A condenser in a steam power plant

Increases expansion ratio of steam
Reduces back pressure of steam
All of these
Reduces temperature of exhaust steam

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Steam Boilers, Engines, Nozzles and Turbines
The factor of evaporation for all boilers is always

Less than unity
Equal to unity
None of these
Greater than unity

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Steam Boilers, Engines, Nozzles and Turbines
Gusset stays in a boiler are provided to

Avoid explosion in furnace
Prevent the bulging of flat surfaces
Prevent leakage of hot flue gases
Support furnace freely from top

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